19 
Substances of animal origin — Continued. 
Hematoporphyrin, 29, 117, 203. 
Hydrocele fluid, 165. 
Milk, 7, 73. 
Boiled milk, 184. 
Casein, 73. 
Mucus, 110. 
Nuclein, 165. 
Pus, 7, 73. 
Saliva, 25, 110. 
Spermatic fluid, 7, 73. 
Sputum, 7, 73. 
Urine, fresh and putrid, 7, 73, 105. 
Coloring matter of urine, 203. 
\Yhite flesh of fish and amphibia, 73. 
Substances of vegetable origin: 
Chlorophyll, 29, 170. 
Coloring matters — 
Brazil wood, 73. 
Campeachy wood, 59, 73. 
Catechu, 59. 
Cherries, 73. • . ’ 
Fernambuc wood, 73. 
Madder, 59, 73. 
Red beet, 73. 
Santal wood, 73. 
Whortleberries, 73. 
Fruit stains, 184. 
Glucose, 165. 
Juice of — 
Blackberry, 59. 
Cherry, 73, 105. 
Currant, 59. 
Grape, 59. 
Mulberry, 59. 
Tomato, 59. 
Leaves of many different plants, 73. 
Starch, 165, 184. 
Miscellaneous substances: 
Aniline red, 73 (for other coloring matters, see above section). 
Fabrics, as follows — 
Linen, 105. 
Shirting, 105. 
Undyed wool, 105. 
Wadding, 105. 
67 common drugs, in feces, 201. 
DELICACY OF THE CHEMICAL TESTS FOR BLOOD. 
One of the principal advantages of the peroxide color tests for blood 
is their delicacy. Obviously this varies with the nature of the ©hromo- 
genic substance employed and with the coloring power and stability of 
the colored product resulting from its oxidation. It may also depend 
